Enzymes make life possible. No cell can survive without enzymes. Life in a cell is made possible through thousands of chemical reactions that take place inside it. If these chemical reactions take place too slowly, the activities of the cell would come to a screaming stop. This is because enzymes are biological catalysts. This means they speed up the chemical reactions.
Remember the enzyme is not altered by the reaction. There are thousands of different enzymes in each of your cells.
Each of these enzymes is responsible for one particular reaction that occurs in the cell that means enzymes are specific. In this lab, we studied catalase (KAT-uh-LAYSS); it speeds up a reaction which breaks down hydrogen peroxide, a toxic chemical, into 2 harmless substances–water and oxygen.
The reaction is: 2 H2O2 —-> 2 H2O + O2
This reaction is important to cells because hydrogen peroxide (H2O2) is produced as a byproduct of many normal cellular reactions. If the cells did not break down the hydrogen peroxide, they would be poisoned and die.